3.5MM CS X 28.7MM ID BLACK BUNA 70D

This o-ring is supplied in black Buna-N (Nitrile) 70 Shore A built to an inside diameter of 28.7 mm (1.13 in), a cross section of 3.5 mm (0.138 in), and an outside diameter of 35.7 mm (1.41 in), catalogued under part number H3.5X28.7. It compresses into its gland to block fluid or gas migration across a joint. Source specification: Metric O-RING, JIS P29.

Expect good resistance to hydraulic fluids, water, and many alcohols. Buna-N (Nitrile) is widely chosen for strong abrasion and tear resistance, reliable performance in both static and dynamic service. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). Applications involving ozone and direct sunlight or polar solvents call for a different compound.

It sees regular use in general industrial maintenance, fluid power, and hydraulic and pneumatic systems.

Order part number H3.5X28.7, sold individually. As always, verify media compatibility and operating conditions against the requirements of your specific application. For a size or compound outside the standard catalog, APG can quote from a print or sample.